[HIGHLIGHTS] Tennis pro Djoković on unrest in Kosovo: "Kosovo is the heart of Serbia. Stop the violence!"

Tennis star Novak Djoković used his opening victory at the French Open for a political message. He wrote: "Kosovo is the heart of Serbia.

Stop the violence!" on the lens of a TV camera. The background to Djokovic's action is the recent unrest in the Serb-dominated north of Kosovo. The organizers of the French Tennis Federation were asked to comment on Djoković's action, but did not respond immediately to a request for comment.